KR102079259B1 - Apparatus for measuring screw efficiency and method for measuring screw efficiency - Google Patents

Abstract

The present invention relates to an apparatus for measuring efficiency of a screw and a method for measuring the efficiency of the screw using the same. The apparatus of the present invention comprises: a rotation motor unit rotating the screw; a pressing fixture unit guiding a working nut screwed to the screw rotated by the rotation motor unit to be linearly moved, and being pressed and moved by the moved working nut; and a load cell measuring a load pressed by the pressing fixture unit. Therefore, efficiency of a rotary force of a motor, that is, a straight force of the screw converted by torque, can be accurately measured. In addition, main components can be designed and selected so that the efficiency of a screw′s linear force is accurately measured to satisfy main performances such as driving torque and driving speed required for a guided missile.

Description

Screw efficiency measuring device and method for measuring screw efficiency using the same {APPARATUS FOR MEASURING SCREW EFFICIENCY AND METHOD FOR MEASURING SCREW EFFICIENCY}

The present invention relates to a device for measuring the efficiency of a screw and a method for measuring the efficiency of a screw using the same. More specifically, a device for measuring the efficiency of a screw capable of measuring the efficiency of the rotational force of the motor, that is, the straight force of the screw converted by torque. And a method of measuring the efficiency of the screw using the same.

In general, a screw is used to convert the rotational force of the rotating motor into linear movement.

The guided ammunition actuator is a device designed to accurately move a control object such as a drive vane through a power transmission process such as a screw or gear using a power source such as a motor.

At this time, it is very important to design and select the main parts to satisfy the main performance such as the driving torque and driving speed required for the guided missile.

In particular, since the performance of the drive blade, which is the final output part, is determined according to the efficiency of the power transmission part (screw, gear, etc.), designing and manufacturing a drive device that precisely meets and recognizes the efficiency of the power transmission part This is a major consideration.

However, until now, the method of measuring the efficiency of screws (lead screws, ball screws, etc.), one of the core parts of the power transmission unit, has not been standardized / universalized.

0001) Korean Patent Registration No. 11738717 'Rackbar Backlash Measurement Device' (2017.05.16.Registration)

An object of the present invention is to provide a screw efficiency measuring device that can accurately measure the efficiency of the rotational force of the motor, that is, the straight force of the screw converted by torque, and a method of measuring the efficiency of the screw using the same.

Another object of the present invention is to measure the efficiency of the screw to accurately measure the efficiency of the straight force of the screw, and to design and select the main parts to satisfy the main performances such as the driving torque and driving speed required for the guided bullet. And it is to provide a method for measuring the efficiency of the screw using the same.

In order to achieve the above object, an embodiment of a device for measuring the efficiency of a screw according to the present invention guides a rotating motor part for rotating a screw and a working nut screwed to a screw rotated by the rotating motor part to be linearly moved. And, it characterized in that it comprises a load cell for measuring the load pressurized by the pressurized jig portion, the pressurized jig portion to be moved by the moving operation nut.

In the present invention, the pressure jig portion is a nut guide member and the nut guide member for guiding the linear movement of the working nut is located inside the working nut screwed to the screw is located therein, the top of the nut guide member, It may include a base jig member for guiding the downward movement.

In the present invention, the nut guide member has a nut movement guide space for guiding the vertical movement of the operation nut by inserting the operation nut therein, and the inner circumferential surface of the nut movement guide space includes A rail for guiding a nut for guiding linear movement of the working nut by restricting rotation may be located.

In the present invention, the nut guide rail is positioned facing the inner circumferential surface of the nut movement guide space and vertically vertically positioned to be inserted into nut grooves located on both sides of the working nut.

In the present invention, a spring member that is compressed by the operation of the working nut and presses the nut guide member may be located inside the nut moving guide space.

In the present invention, the spring member is a coil spring compressed by the working nut which is moved downward by a screw, and a spring support protrusion for supporting the position of the spring member may be located at the bottom of the nut movement guide space.

In the present invention, the spring support protrusion has a larger diameter than the screw, thereby preventing the working nut from being separated from the screw.

In the present invention, the load cell has a pressure guide protrusion protruding at the center, and a guide protrusion insertion part for guiding the vertical movement of the nut guide member may be located on the lower surface of the nut guide member.

In the present invention, the pressure guide protrusion may be screwed to the guide protrusion insert.

An embodiment of the apparatus for measuring the efficiency of a screw according to the present invention may further include a measurement control unit that controls the operation of the rotary motor unit and receives the measured load from the load cell to calculate the efficiency of the screw.

로 스크류의 효율을 계산할 수 있다. In the present invention, the measurement control unit is a mathematical expression through the torque value (T) of the rotating motor unit and the load value (F) measured by the load cell.

The efficiency of the screw can be calculated.

(η: efficiency of screw, L: lead of screw, T: torque value of rotating motor part 100 (stall torque / Nm), F: axial force (load value measured by load cell))

In the present invention, the measurement control unit may include an input unit capable of inputting a torque value of a rotating motor unit or a lead value of a screw, and a display unit outputting and displaying the calculated efficiency of the screw.

In order to achieve the above object, the method for measuring the efficiency of a screw according to the present invention includes a screw preparation step of fastening a working nut to a screw, a load cell pressing step of pressing a load cell by moving a working nut by rotating a screw to a rotating motor part, and a load cell It characterized in that it comprises a load measuring step of measuring the load by the movement of the operating nut, a screw efficiency calculating step of calculating the efficiency of the screw with the load measured in the load cell.

In the present invention, the load cell pressing step is a process of moving the working nut toward the load cell by rotating the screw, the process of compressing the spring member by the movement of the working nut, and the process of pressing the load cell by compressing the nut guide member while the spring member is compressed It may include.

In the process of pressing the load cell in the present invention, after the spring member is compressed to the maximum by the movement of the working nut, the nut guide member is moved to press the load cell.

로 스크류의 효율을 계산할 수 있다.In the present invention, the screw efficiency calculation step is based on the torque value (T) of the rotary motor and the load value (F) measured by the load cell.

The efficiency of the screw can be calculated.

(η: efficiency of screw, L: lead of screw, T: torque value of rotating motor part 100 (stall torque / Nm), F: axial force (load value measured by load cell))

The present invention has an effect that can accurately measure the efficiency of the rotational force of the motor, that is, the straight force of the screw converted by the torque.

The present invention has an effect of accurately designing and selecting major parts so as to accurately satisfy the main performances such as a driving torque and a driving speed required for guided missiles by accurately measuring the efficiency of the straight force of the screw.

1 is a perspective view showing an apparatus for measuring the efficiency of a screw according to the present invention.
Figure 2 is a front view showing an embodiment of an apparatus for measuring the efficiency of a screw according to the present invention.
Figure 3 is a perspective view showing an example of disassembling the rotary motor in one embodiment of the screw efficiency measuring device according to the present invention.
Figure 4 is a cross-sectional view showing an embodiment of a screw efficiency measuring device according to the present invention.
Figure 5 is a block diagram showing an embodiment of a method for measuring the efficiency of a screw according to the present invention.

Hereinafter, the present invention will be described in more detail.

If described in detail by the accompanying drawings, preferred embodiments of the present invention. Prior to the detailed description of the present invention, terms or words used in the present specification and claims described below should not be interpreted as being limited to a conventional or dictionary meaning. Therefore, the configuration shown in the embodiments and drawings described in this specification is only one of the most preferred embodiments of the present invention and does not represent all of the technical spirit of the present invention. It should be understood that there may be equivalents and variations.

1 is a perspective view showing an apparatus for measuring the efficiency of a screw according to the present invention, and FIG. 2 is a perspective view showing an example of disassembling a rotating motor in an embodiment of an apparatus for measuring the efficiency of a screw according to the present invention, and FIG. 3 is It is a cross-sectional view showing an embodiment of an apparatus for measuring the efficiency of a screw according to the present invention.

The efficiency measuring device of the screw 10 according to the present invention will be described in detail below with reference to FIGS. 1 to 3.

The apparatus for measuring the efficiency of a screw according to the present invention includes a rotating motor unit 100.

The rotating motor unit 100 is mounted on the pressure jig unit 200 and is located in a state where the screw 10 is downward and vertically erected.

The pressing fixture 200 has a nut guide member 210 and a nut guide member 210 that guide the linear movement of the working nut 20 by having the working nut 20 screwed to the screw 10 positioned therein. It is located inside and includes a base jig member 220 for guiding up and down movement of the nut guide member 210.

The nut guide member 210 is positioned with a nut movement guide space 210a into which the operation nut 20 is inserted to guide vertical movement of the operation nut 20.

In addition, a nut guide rail 211 for guiding the linear movement of the working nut 20 by limiting the rotation of the working nut 20 when the screw 10 is rotated is located on the inner circumferential surface of the nut moving guide space 210a. .

As an example, the nut guide rail 211 is a movable rail protruding to be inserted into nut grooves located on both sides of the working nut 20.

The nut guide rail 211 is positioned opposite to the inner circumferential surface of the nut movement guide space 210a and vertically vertically positioned to be inserted into the nut grooves located on both sides of the operating nut 20 to operate the nut when rotating the screw ( It limits the rotation of 20) and guides the linear movement of the working nut 20.

And, the nut guide rail 211 is formed in a shape corresponding to the nut groove to guide the linear movement of the working rail.

In addition, although the nut guide rail 211 is not illustrated, a rail groove shape in which a part of the operation nut 20 may be inserted into an inner circumferential surface of the nut movement guide space 210a.

Rail guide rail 211 in the form of a rail groove is formed to have a shape in which a portion of the working nut 20 can be inserted and is vertically positioned to guide the linear movement of the working nut 20.

In this case, the nut protrusions (not shown) that can be inserted into the rail guide rail 211 in the form of rail grooves may be located on both sides of the operation nut 20.

In addition, the notched rail groove type nut guide rail 211 is formed in a vertical direction on the inner circumferential surface of the nut movement guide space 210a in a shape corresponding to the nut protrusion, and the nut protrusion is inserted to rotate the screw 10 When limiting the rotation of the working nut 20 and guides the linear movement of the working nut 20.

The operating nut 20 is screwed to the screw 10 through which the screw 10 to be measured is penetrated, and when the screw 10 is rotated by the nut guide rail 211 in the nut moving guide space 210a, the operating nut The rotation of (20) is limited and moved linearly.

The rotating motor unit 100 is an example of a screw-integrated rotating motor in which the screw 10 to be measured is integrally provided.

The rotating motor unit 100 rotates the screw 10 so that the working nut 20 moves forward, that is, moves downward to press the load cell 300.

The nut guide member 210 is movably positioned within the base jig member 220, and the load pressed by the nut guide member 210 on the lower side of the nut guide member 210 inside the base jig member 220 Load cell 300 that can measure is located.

In the base fixture member 220, a pressure space in which the nut guide member 210 is movably positioned is located, and a load cell 300 is positioned in a lower side of the nut guide member 210 in the pressure space.

The load cell 300 senses the load generated by the nut guide member 210 that is pressed down by the working nut 20 and moves downward.

A spring member 400 for elastically supporting the working nut 20 is located inside the nut movement guide space 210a, and the spring member 400 is moved by a working nut 20 moved downward by a screw 10. An example is a coil spring that is compressed.

At the bottom of the nut movement guide space 210a, a coil spring, that is, a spring support protrusion 212 for supporting the position of the spring member 400 is positioned.

The spring member 400, which is a coil spring, is positioned at the center of the nut movement guide space 210a while the spring support protrusion 212 is inserted and fitted therein to be pressed evenly by the working nut 20 to operate the nut 20 The pressing force of the so as to be transmitted to the nut guide member 210.

The spring support protrusion 212 has a larger diameter than the screw 10 to prevent an accident that the working nut 20 is caught and falls out of the screw 10.

The spring member 400 prevents damage due to an impact generated when the working nut 20 directly collides with the nut guide member 210, and of course the nut guide member 210 pressurizes the load cell 300. It serves to transmit the load so that it can.

When the working nut 20 directly hits the nut guide member 210 and an abrupt load is applied to the load cell 300, the reliability of the load value measured by the load cell 300 is measured in measuring the screw 10 efficiency. There may be cases where it cannot be secured.

Accordingly, as the spring member 400 is compressed by the downward movement of the working nut 20, the spring member 400 is compressed as much as possible, and then the nut guide member 210 descends to pressurize the load cell 300. It is possible to stably and accurately secure the load value measured by being applied to the load cell 300, thereby stably and accurately calculating and calculating the efficiency of the screw 10.

In addition, the load cell 300 has a pressure guide protrusion 310 protruding from the center, and a pressure guide protrusion 310 is inserted into a lower surface of the nut guide member 210 to guide vertical movement of the nut guide member 210. The guide projection insertion portion 213 is located.

When the nut guide member 210 is pressed and moved downward by the working nut 20, it is accurately moved in the vertical direction along the pressing guide protrusion 310 to generate a load on the load cell 300.

The pressure guide protrusion 310 is screwed to the guide protrusion insertion portion 213 to transfer the load of the nut guide member 210 to the load cell 300.

In addition, the efficiency measuring device of the screw 10 according to the present invention controls the operation of the rotating motor unit 100 and receives a measured load from the load cell 300 to calculate the efficiency of the screw 10. 500) may be further included.

The measurement control unit 500 includes an input unit 520 through which a torque value of the rotary motor unit 100 or a lead value of the screw 10 can be inputted, and a display that outputs and displays the calculated efficiency of the screw 10 It may include a portion 510.

In addition, the measurement control unit 500 may include a motor operation control unit for which the torque value of the rotation motor unit 100 is preset, and controls the operation of the rotation motor unit 100 to rotate the torque value.

Measurement control unit 500 through the torque value (T) of the rotary motor unit 100 and the load value (F) measured by the load cell 300 through the equation (1) of the efficiency (η) of the screw (10) To calculate.

η: Screw efficiency

L: screw lead

T: Torque value of the rotating motor unit 100 (stall torque / Nm)

F: Axial force (load value measured by load cell)

The lead value of the screw 10 and the torque value of the rotating motor unit 100 may be pre-stored in the measurement control unit 500 as a predetermined value in the specification of the screw 10 and the motor specification, and an operator may use the screw 10 It is revealed that the specifications and the motor specifications can be input to the measurement control unit 500 through the input unit 520, respectively.

On the other hand, Figure 4 is a block diagram showing an embodiment of a method for measuring the efficiency of a screw according to the present invention, and referring to FIGS. 3 and 4, the method for measuring the efficiency of a screw according to the present invention operates on a screw 10 Screw preparation step (S100) for fastening the nut 20, the load cell pressing step (S200) for pressing the load cell 300 by moving the working nut 20 by rotating the screw 10 to the rotating motor part 100, Load measurement step (S300) to measure the load due to the movement of the operating nut (20) in the load cell (300), screw efficiency calculation step (S400) to calculate the efficiency of the screw (10) with the load measured in the load cell (300) It includes.

The load cell pressing step (S200) is a process of moving the working nut 20 toward the load cell 300 by rotation of the screw 10, the process of compressing the spring member 400 by the movement of the working nut 20, the spring member As the 400 is compressed, the nut guide member 210 is moved to press the load cell 300.

In the load cell pressing step (S200), the nut guide member 210 is compressed after the working nut 20 directly hits the load cell 300 and compresses the spring member 400 by moving the working nut 20 without pressing. It is moved and presses the load cell 300.

In the screw efficiency calculation step (S400), the efficiency η of the screw 10 is calculated by Equation 2 below.

η: Screw efficiency

L: screw lead

T: Torque value of the rotating motor (stall torque / Nm)

F: Axial force (load value measured by load cell)

The present invention can accurately measure the efficiency of the rotational force of the motor, that is, the straight force of the screw 10 converted by torque.

The present invention is to accurately measure the efficiency of the straight force of the screw (10) to design and select the main parts to satisfy the main performance, such as the driving torque, the driving speed required in the guided missile.

The present invention is not limited to the above-described embodiments, but can be carried out by variously changing within a range not departing from the gist of the present invention, and it is revealed that it is included in the configuration of the present invention.

10: screw 20: working nut
21: nut groove 100: rotary motor
110: screw adapter 200: press fixture
210: nut guide member 210a: nut movement guide space
211: Nut guide rail 212: Spring support projection
213: guide projection insert 220: base fixture member
300: load cell 310: pressurized guide projection
400: spring member 500: measurement control
510: display unit 520: input unit

Claims (16)

A rotating motor unit for rotating the screw;
A pressing fixture for guiding the working nut screwed to the screw rotated by the rotating motor portion to move linearly and being pressed and moved by the moved working nut; And
It includes a load cell for measuring the load pressed by the pressing fixture,
The pressing fixture,
A nut guide member that is located inside the working nut screwed to the screw to guide linear movement of the working nut; And
The nut guide member is located inside and includes a base jig member for guiding up and down movement of the nut guide member,
The nut guide member has a nut movement guide space in which the operation nut is inserted and guides the vertical movement of the operation nut.
On the inner circumferential surface of the nut movement guide space, a nut guide rail is provided to guide the linear movement of the operation nut by limiting rotation of the operation nut when the screw is rotated,
A spring member that is compressed by the operation of the working nut and presses the nut guide member is located inside the nut movement guide space,
The spring member is a coil spring compressed by the working nut which is moved downward by a screw,
At the bottom of the nut movement guide space, the spring member is inserted to locate a spring support protrusion for supporting the position of the spring member,
The operating nut is linearly moved by the rotation of the screw by the operation of the rotating motor unit to compress the spring member while transmitting a pressing force to the nut guide member, and the nut guide member is applied to the received pressing force while the spring member is compressed. Moved to press the load cell to generate a load value (F),
Further comprising a control unit for controlling the operation of the rotary motor unit, and receives the measured load from the load cell to calculate the efficiency of the screw,
The measurement control unit is a mathematical expression through the torque value (T) of the rotating motor unit and the load value (F) measured by the load cell

A screw efficiency measuring device characterized in that it calculates the efficiency of the low screw.
(η: efficiency of screw, L: lead of screw, T: torque value of rotary motor 100 (stall torque / Nm), F: axial force (load value measured by load cell))
delete delete The method according to claim 1,
The nut guide rail is positioned to face the inner circumferential surface of the nut movement guide space and is vertically vertically positioned to be inserted into nut grooves located on both sides of the working nut.
delete delete The method according to claim 1,
The spring support protrusion has a larger diameter than the screw to prevent the operating nut is separated from the screw efficiency measuring device of the screw.
The method according to claim 1,
The load cell has a pressure guiding protrusion protruding at the center, and the guide guiding protrusion inserting portion for guiding the vertical movement of the nut guide member is located on the lower surface of the nut guide member, thereby increasing the efficiency of the screw. Measuring device.
The method according to claim 8,
The pressure guide projection is a screw efficiency measuring device characterized in that the screw is coupled to the guide projection insert.
delete delete The method according to claim 1,
The measurement control unit comprises an input unit for inputting a torque value of a rotating motor unit or a lead value of a screw, and a display unit for outputting and displaying the calculated efficiency of the screw.
Screw preparation step for fastening the operating nut to the screw;
A load cell pressing step of rotating the screw with a rotating motor part to move the working nut to firstly press the nut guide member to linearly move, and pressurize the load cell by the linearly moving nut guide member;
A load measuring step of measuring a load pressed by the movement of the nut guide member in the load cell; And
Screw efficiency to calculate the efficiency of the screw from the load measured in the load cell
A process of moving the working nut toward the load cell by rotating the screw, and compressing the spring member by moving the working nut;
The spring member is compressed while the nut guide member is moved to include a process of pressing the load cell,
The screw efficiency calculation step,
Equation through the torque value (T) of the rotary motor and the load value (F) measured by the load cell

Method of measuring the efficiency of the screw, characterized in that for calculating the efficiency of the low screw.
(η: efficiency of screw, L: lead of screw, T: torque value of rotary motor 100 (stall torque / Nm), F: axial force (load value measured by load cell))
delete The method according to claim 13,
The process of pressing the load cell is a method of measuring the efficiency of the screw, characterized in that the spring member is compressed to the maximum by the movement of the working nut, and then the nut guide member is moved to press the load cell.
delete

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